William Cecil Campbell is an Irish and American microbiologist known for his work in discovering a novel therapy against infections caused by roundworms, for which he was jointly awarded the 2015 Nobel Prize in Physiology or Medicine. He helped to discover a class of drugs called avermectins, whose derivatives have been shown to have "extraordinary efficacy" in treating River blindness and Lymphatic filariasis, among other parasitic diseases affecting animals and humans. Campbell worked at the Merck Institute for Therapeutic Research 1957–1990, and has become a research fellow emeritus at Drew University. The Nobel Prize in Physiology or Medicine 2015, announced October 5, 2015. William C. Campbell (1/4), “for their discoveries concerning a novel therapy against infections caused by roundworm parasites”. Satoshi Ōmura (1/4), “for their discoveries concerning a novel therapy against infections caused by roundworm parasites”. Tu Youyou (1/2), “for her discoveries concerning a novel therapy against Malaria”. William C. Campbell: born 1930, Ramelton, Ireland. Satoshi Ōmura: born 1935, Yamanashi Prefecture, Japan. Tu Youyou: born 1930, Zhejiang Ningbo, China. Wiki link Wiki link Wiki link Data: the Nobel Foundation (CC0).